Question

Difficulty: EasyData Integration and Analytical Storage

A company has 100 GB100\text{ GB} of transactional logs in CSV format stored in an Azure Data Lake Storage Gen2 (ADLS Gen2) account. You need to design an analytical query solution that meets the following requirements:
- Allows data analysts to run ad-hoc, exploratory T-SQL queries on the CSV files.
- Minimizes costs and administrative overhead by avoiding persistent compute resources.
- Ensures that the data remains available even if the primary Azure region suffers a complete outage.

Which two configurations should you recommend in your design?

  1. Query the files directly using a serverless SQL pool in Azure Synapse Analytics.Answer
  2. Configure the storage account to use Geo-Redundant Storage (GRS).Answer
  3. C
    Provision a Dedicated SQL pool in Azure Synapse Analytics to load and query the CSV files.
  4. D
    Configure the storage account to use Locally Redundant Storage (LRS).
  5. E
    Generate a Shared Access Signature (SAS) token with a three-year lifetime directly on the container to authorize the queries.

Answer

Query the files directly using a serverless SQL pool in Azure Synapse Analytics and configure the storage account to use Geo-Redundant Storage (GRS).
Using a serverless SQL pool in Azure Synapse Analytics allows you to run ad-hoc T-SQL queries directly on the CSV files in Azure Data Lake Storage Gen2 without the cost or overhead of provisioned compute. To ensure regional resilience, configuring the storage account with Geo-Redundant Storage (GRS) replicates data to a secondary region, protecting against regional outages.

Step-by-Step Solution

1
Determine the optimal query compute option.
Serverless SQL pool is selected.
Since the queries are ad-hoc and run infrequently on CSV files, a serverless SQL pool avoids the administrative overhead and cost of running a persistent dedicated SQL pool.
2
Determine the optimal storage redundancy model.
Geo-Redundant Storage (GRS) is selected.
To ensure availability during a complete regional outage, GRS replicates data to a secondary region, unlike LRS which is confined to a single datacenter.

Key Concept

Designing cost-effective analytical storage queries and high-availability storage configurations.
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